Helen Baxendale as Agatha Christie

Blake Harrison as Travis Pickford

Jacqueline Boatswain as Audrey Evans

Gina Bramhill as Grace Nicory

Daniel Caltagirone as Eli Schneider

Thomas Chaanhing as Frankie Lei

Scott Chambers as Clarence Allen

Vanessa Grasse as Nell Lewis

Jodie McNee as PC O'Hanauer

Elizabeth Tan as Jun Yuhuan

Morgan Watkins as Rocco Vella

Alistair Petrie as Sir Malcolm Campbell